Spring-dampener.



No. 746,043. PATENTE!) DEG. 8', 1903.

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SPRINGy DMPENER.

ArlLIoATIoN FILED un. 2, 190s.

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SPRING DAMPENER.

APPLIUATION FILED JAN. 2, 1903.

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Nuo. 746,043.

I UNITED STATES Patented December 8, 1903. v

PATENT OFFICE. l

EDWARD DENEGRE, OF CHICAGO, ILLINOIS, ASSIGNOR TO MCCORD & COM-4 PANY,` OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

SPECIFICATION forming part of 'Letters Patent No. 746,043, dated December s, 1903.

Application filed Jann ary Z. 1903. Serial No 1371547 (N0 model-l l 1`0 all whom it. may concern; f

Be' it known that I, EDWARD DENEGRE, a

citizen of the United States, residing at Chicago, in the county of Cook and State of Illi- 5 nois,`have invented a certain new and useful Improvementin Spring-Dampeners, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of 1o this speciiication.

' My invention relates to spring-dampeners for use uponrailway-cars and, the like to dampen or suppress the vibratory movements of the springs thereof.

Prominent objects of the invention are to provide a simple, practical, and durable form of spring-dampener, to increase the dampening action and secure a high degree of efciency and eifectiveness, and to secure thev zo above results in a simple and expeditious manner- In the spring-dampener which I have herein shown for carrying out my invention I provide a flat or leaf spring member which opposes the load just las the coil spring or springs do. Asimple arrangementis to make this fiat spring member in the form of atwopart casing, one partv above and the other below the coil-spring member,and to construct 3o the two parts with inclined spring sides whereof those of one part oppose those of the other. By such arrangement the load is opposed by the spring-casing' and the coil-springs are dampened thereby. According to my invention also'I combine with such a flat spring member a friction device which increasesthe dampening action. AA simple arrangement is to provide afriction device which vis interposed between the opposing spring sides of 4o the two partsof the casing, so that as the same are forced together and move outwardly they slide upon the friction device, which is held stationary, and thereby add friction, which assists in repressing vibration.

In the accompanying drawings, Figure 1 is a plan of a spring-dampener embodying my present invention. Fig. 2 is a vertical section taken on' line 2 2 in Fig. 1, it being understood that in this figure lthe device is not 5o subject to any load. Fig. 3 is a section similar to that of Fig. 2 with the dampener subject to partial load.v Fig. 4 is a similar sec- ;tion with the device subject to full load. Fig.'5 is a plan of a modified form of dam- ;pener. Fig. 6 is a vertical section taken'on 55 `line 6 6 in Fig. 5. Fig. 7 is a plan of a still dierent modification; and Fig. 8 is asection of the same, taken on line 8 8 in Fig. 7. p Referring first to Figs. 1" to 4, inclusive, the device shown in these iigu res consists of an up- 6o per metallic plate A and a lower metal plate B, the two being arranged opposite one another,

with a set of coil-springs C C interposed between them. The plates A and B are desirably made of spring metal, such as springsteel. The plate A is constructed with sloping or oblique sides 1 1, having dat end or tailpieces 4 4, which latter are arranged op- 7o posite the tailpieces 2 2. The plate A is provided withv a socket 5 and the plate B with a socket 6 and a bolt 7 is extended through. these plates, so that its head fits in thesocket 6, and its'nut in the socket 5.

`toward each other, with the result-that the 8o sides 1 l and 3 3 thereof will become flattened out to some extent. When subject to a still greater load, as shown in'Fig. 4, these oblique sides will be iiattened out still more. Thiis it will be seen that the obliquesides of the casing formed by the plates A and B oer a resistance to the springaction which serves to dampen or suppress the vibratory movement of the coil-springs C C.

In Figs. aud 6 I have shown adevice hav- 9o ing a generally similar construction to that of Figs. 1 to 4. It consists of upper and lower spring-plates A and B, having oblique sides l 1 and 3 3, with Hat ends 2 2 and 4 4, respectively. These plates are held together by a bolt 7. In this device, however, the at Aends 2 2 and 4 4 of the plates'A and B do not quite meet under any load, but are separated by an appreciable space, as well shown in Fig. 6.

two plates is a yoke D, which extends lengthwise of the device and is made with a bent When the de- 75 vice as thus constructed is not subject yto any load, it will bein the 'position shown in Fig. 2.

Within the casing formed by these roo 2 2 and 4 4of the casing-plates A and B. In

this device the action of the load, as before, compresses the coilsprings C C, thereby bringing the plates A and B toward one another and causing the spring sides l l and 3 3 thereof to assume a greater Obliquity. In the present device, however, the fiat ends 2 2 and 4 4 of these plates A and B both rub against the friction-plates 9 9 in their movements, so that friction is produced between the fiat ends 2 2 and 4 4 and the friction-plates 9 9, which adds to the dampening or vibrationsuppressing eect. In the device of Figs. l to 4, inclusive, it will be observed that the iiat ends 2 2 and 4 4 of the plates A and B move substantially in unison, and consequently there is no rubbing or surface fric" tion between them.

The device shown in Figs. 7 and 8 is similar to that shown in Figs. 5 and 6, except that the end portions 2' 2' and 4' 4' are inclined to one another instead of being parallel and the friction elements between them are in the form of wedges 11 1l. By this arrangement the friction on compression of the coil-springs is reduced, but is increased on expansion of those springs. Thus the dampening action is modified or regulated to conform more closely to the desired requirements.

I claim- 1. Inaspring-dampener,aspring-platehaving outwardly-inclined spring sides provided with outwardly-bent end portions, substantially as described.

2. A spring-dampener, consisting of a coil spring or springs, and a spring-casing consisting of two spring plates or members having outwardly-extendinginclined spring sides provided with opposing outwardly-extending end portions, substantially as described.

3. In a spring-dampener, the combination with a coil spring or springs, of a flat spring member and a friction device acting to produce a dampening effect, substantially as de# scribed.

4. In a sprng-dampener, the combination with a coil spring or springs, of a flat spring member, and a friction device coperating with said member to produce a dampening eect, substantially as described.

5. In a spring-dampener, the combination with opposing spring members, of a friction device interposed between said members, substantially as described.

6. In a spring-dampener, the combination of a two-part spring-casing having opposing spring surfaces and a friction device interposed between said surfaces, substantially as described.

7. In a spring-dampener, the combination with a two-part spring-casing, whereof the two parts have similarly-extending converging spring sides provided with abutting bent end portions, and a friction device consisting of friction members interposed between said abutting end portions, and a connection between said friction members, substantially as described.

8. A spring-dampener, comprising a coil spring or springs, a two-part casing whereofv the parts are arranged at the opposite' ends' of the coil-springs and are constructed with outwardly-extendin g converging spring sides having outwardly-bentopposing end portions, and a friction device consisting of friction elements, interposed between the opposing end portions of the sides, and a connectingbar between said friction elements, substantially as described.

9. A spring-dampener, comprising a coil spring or springs, a two-part casing whereof the parts are arranged at the opposite ends of the coil-springs and are constructed with outwardly-extending inclined spring sides having outwardly-bent opposing end portions, Vand a friction device consisting of wedgeshaped friction elements interposed between the opposing end portions of the sides, and a connectingbar between said friction' elements, substantially as described.

In witness whereof I hereunto subscribe my name this 30th day of December, A. D. 1902.

EDWARD DENEGRE.

Witnesses:

A. MILLER BELEIELD, I. C. LEE. 

